Emergent Dirac fermions in graphene and underlying Au monolayer with two-dimensional ferrimagnetism
Using angle-resolved photoemission spectroscopy (ARPES) with spin resolution, scanning tunneling microscopy/spectroscopy (STM/STS) and density functional theory (DFT) methods, we study the electronic structure of graphene-covered and bare Au/Co(0001) systems and reveal intriguing features, arising from the ferrimagnetic order in graphene and the underlying gold monolayer. In particular, a spin-polarized Dirac-cone-like state, intrinsically related to the induced magnetization of Au, was discovered at point. We have obtained a good agreement between experiment and theory for bare and graphene-covered Au/Co(0001) and have proven that both Au ferrimagnetism and the Dirac-cone-like band are intimately linked to the triangular loop dislocations present at the Au/Co interface. STM measurements and simulation of the local density of states reveal a magnetic band gap in the electronic structure of graphene for out-of-plane magnetization. This gap is promising for achieving a quantum anomalous Hall state in graphene.
Authors
- Anna A. Rybkina (ORCID: https://orcid.org/0000-0003-3215-1084)
- А. С. Фролов (ORCID: https://orcid.org/0000-0001-7955-6359)
- J. Sánchez‐Barriga (ORCID: https://orcid.org/0000-0001-9947-6700)
- Dmitry Yu. Usachov (ORCID: https://orcid.org/0000-0003-0390-0007)
- A. V. Eryzhenkov (ORCID: https://orcid.org/0000-0001-7560-5264)
- Dmitrii A. Pudikov (ORCID: https://orcid.org/0000-0002-4804-3080)
- D. A. Estyunin (ORCID: https://orcid.org/0000-0003-3947-5049)
- Taichi Okuda (ORCID: https://orcid.org/0000-0002-5790-3847)
- Kenta Kuroda (ORCID: https://orcid.org/0000-0002-0151-0876)
- A. M. Shikin (ORCID: https://orcid.org/0000-0002-2476-1248)
- Yogendra Kumar (ORCID: https://orcid.org/0000-0002-5021-1426)
- Shiv Kumar (ORCID: https://orcid.org/0000-0001-7793-9276)
- V. S. Stolyarov (ORCID: https://orcid.org/0000-0002-5317-0818)
- K. Shimada (ORCID: https://orcid.org/0000-0002-1945-2352)
- A. Varykhalov (ORCID: https://orcid.org/0000-0002-7901-3562)
- И. И. Климовских (ORCID: https://orcid.org/0000-0003-0243-0322)
- А. В. Тарасов (ORCID: https://orcid.org/0000-0002-3628-4856)
- Artem G. Rybkin (ORCID: https://orcid.org/0000-0002-8237-4959)
- Vladimir Voroshnin (ORCID: https://orcid.org/0000-0002-9320-1180)
- Koji Miyamoto
- A. Petukhov (ORCID: https://orcid.org/0000-0001-9362-3589)
- Takuma Iwata
Institutions
- Hiroshima University (JP)
- Moscow Institute of Physics and Technology (RU)
- St Petersburg University (RU)
- Helmholtz-Zentrum Berlin für Materialien und Energie (DE)
- IMDEA Nanoscience (ES)
- Donostia International Physics Center (ES)
Publication Details
- Journal
- Nanoscale
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5nr01969a
- Primary Topic
- Graphene research and applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00